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jcmd, Circa JDK 11

Nicolas Fränkel recently published a survey of command-line tools delivered with OpenJDK 11 in the blog post “OpenJDK 11, tools of the trade.” In that post, he briefly summarizes the tools jps (a JVM process status tool), jinfo (JVM configuration details), jmap (classes/objects on ...

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JAX-WS Change Endpoint Example

In this example, we will demonstrate how to change the service endpoint in a Java web service client application. 1. Introduction A web service (which is described in a WSDL file) can have one or more endpoints.  A web service endpoint is a URL used to locate and access a web...

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Dynamic Content Caching with AWS Lambda, S3 and AWS CloudFront

Serving content quickly is essential for any website or application to have better customer experience. If you have hosted your website or application in AWS Cloud, then it’s very easy to serve the content quickly with lower latency irrespective of where your application is being accessed from. ...

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Balance Innovation, Commitment, & Feedback Loops: Summary

Is it possible to balance the product innovation and feedback we need, with the commitment our management wants? Maybe. I tried to how my thinking for these questions in this series: When does it make sense to ask for or offer estimation and commitments?When does it make sense to ask for...

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6 Blockchain Career Options You Need to Know About for 2019

Blockchain technology has gone beyond a buzzword. With its innovative characteristics and potential to revamp the complete industrial era, the technology has become the hottest topic of the time, with every second business leader looking forward to incorporating the technology into their...

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Java Strategy Design Pattern Example

1. Introduction to Java Strategy Design Pattern In this article, we will elaborate java Strategy design pattern in detail which is one of the important behavioral design pattern. The Strategy design pattern is also referred to as a policy pattern which allows the selection of an algorithm at ...

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How to Deploy Maven Artifacts to CloudRepo via Rultor

In my previous article, I described how to set up a private Maven repository in Amazon S3 and deploy there via Rultor. This is a great solution if you’re familiar with managing Amazon Web Services (AWS), S3, and AWS Identity and Access Management (IAM). However, if you’re not comfortable adm...

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Behavioural Design Patterns: Visitor

Our last pattern of the behavioural design patterns is going to be the visitor pattern. We use the visitor pattern when we want to make it possible to define a new operation for classes of an object structure without changing the classes. Imagine the scenario of a software that executes...

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How to leverage your Java skills to get into machine learning

You might have heard of machine learning. The world seems to have been enveloped with hype around the topic, with everything from self-driving cars to human-like robots getting highlighted. As a Java developer, you might have felt a bit left out: most of the popular data science and machine...

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Amazon Corretto 8

UPDATE! I have updated the option of running Corretto in Docker to using the amazoncorretto Docker image available from Docker Hub. Amazon Corretto is a production-ready distribution of OpenJDK with long-term support including performance- and security updates provided by Amazon. Amazon...

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Apache Maven Eclipse Project Creation Using Archetype Example

1. Introduction Eclipse is a Java Integrated Development Environment (IDE). Eclipse has had Maven Integration for Eclipse since version Luna. Maven Archetype is a Maven project template plug-in. It enables developers to create a new maven project consistently and quickly. Eclipse IDE...

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Avoid Lists in Cassandra

Apache Cassandra is fast and scalable database which over the years became almost as easy to use as a traditional SQL database. At least on the surface. You an use SQL-like queries, but they have a lot of limitations; you have a schema, but it’s not as flexible to modify it as in a SQL d...

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[MEGA DEAL] The Complete Back-End Developer Bundle (95% off)

Create Professional Web Apps & Fast Track Your Coding Career with 60+ Hours of Training in Bootstrap, Angular & More Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer. We are offering a massive 95% off on The Complete Back-End Developer...

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Build a Web App with Spring Boot and Spring Security in 15 Minutes

“I love writing authentication and authorization code.” ~ No Java Developer Ever. Tired of building the same login screens over and over? Try the Okta API for hosted authentication, authorization, and multi-factor auth. Developers know that securing web apps can be a pain. Doing it right is t...

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Java Code Geeks are giving away 2 FREE PRO passes for DeveloperWeek 2019

#DEVWEEK 2019 — The World’s Largest Developer Expo & Conference Series The DeveloperWeek team has offered us discounted PRO Passes to DeveloperWeek 2019 so our members can attend the event. DeveloperWeek (#DEVWEEK 2019) (Feb 20-24, Oakland Convention Center) is the world’s largest inde...

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Filterer Pattern in 10 Steps

Filterer is a pattern that should be applied only in certain cases. In the original post, I presented a very simple example intended to show howto apply it. In this post, I present a much more detailed example that’s intended to also explain when and why to a...

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A First Look at Oracle Functions

I am super happy to have gotten the opportunity to test out Oracle Functions through the Cloud Native Limited Availability Program. When I last tried out running serverless functions in Oracle Cloud during the Oracle Groundbreaker APAC Tour last year, there were two options available. Either...